Connectivity refers to the inextricable relationship of life forms and natural resources to all other life forms and natural resources. A change in one part of the ecosystem affects all other parts of the ecosystem (or surrounding ecosystems), directly or indirectly.
This chart from the Global Footprint Network (read from right to left) shows how irresponsible consumption can have far-reaching, negative effects on an ecosystem.
“When we try to pick out anything by itself, we find it hitched to everything else in the Universe.”—John Muir